λ
Sigma Notebook

1,381,729

1117 × 1237
Deficient Odd Composite

1,381,729 is odd and not a perfect square. Its factorization is 1117 × 1237 and its 4 divisors sum to 1,384,084.

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Prime Factor Structure

Factorization String 1117 × 1237
Distinct Prime Factors 2
Square Status No
Abundance Measure Deficient

Analytical Properties

Total Divisors 4
Divisor Sum (σ) 1,384,084
Proper Divisor Sum 2,355
Digit Sum / Digital Root 31 (Root: 4)
Adjacent Primes #1381727 ← → #1381739

Radix Representation

Decimal 1381729
Binary 101010001010101100001 (21 bits)
Octal 0o5212541
Hexadecimal 0x151561

Divisor Catalog (4)

1 1,117 1,237 1,381,729

Collatz Trajectory (137 steps to reach 1)

Iterative sequence n → n/2 (if even) or 3n+1 (if odd):

Showing the first 5 trajectory entries; the stopping-time total above is unchanged.

1,381,729 4,145,188 2,072,594 1,036,297 3,108,892

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